Is Sikhism a Pantheistic religion? Personally I do not think so. But here is the definition from the Stanford Encyclopedia of Philosophy. Have a good discussion. 
Pantheism
First published Tue Jun 4, 1996; substantive revision Thu May 17, 2007
Pantheism is a metaphysical and religious position. Broadly defined it is the view that (1) "God is everything and everything is God … the world is either identical with God or in some way a self-expression of his nature" (Owen 1971: 74). Similarly, it is the view that (2) everything that exists constitutes a "unity" and this all-inclusive unity is in some sense divine (MacIntyre 1967: 34). A slightly more specific definition is given by Owen (1971: 65) who says (3) "‘Pantheism’ … signifies the belief that every existing entity is, only one Being; and that all other forms of reality are either modes (or appearances) of it or identical with it." Even with these definitions there is dispute as to just how pantheism is to be understood and who is and is not a pantheist. Aside from Spinoza, other possible pantheists include some of the Presocratics; Plato; Lao Tzu; Plotinus; Schelling; Hegel; Bruno, Eriugena and Tillich. Possible pantheists among literary figures include Emerson, Walt Whitman, D.H. Lawrence, and Robinson Jeffers. Beethoven (Crabbe 1982) and Martha Graham (Kisselgoff 1987) have also been thought to be pantheistic in some of their work — if not pantheists.
The book recognized as containing the most complete attempt at explaining and defending pantheism from a philosophical perspective is Spinoza's Ethics, finished in 1675 two years before his death. In 1720 John Toland wrote the Pantheisticon: or The Form of Celebrating the Socratic-Society in Latin. He (possibly) coined the term "pantheist" and used it as a synonym for "Spinozist." However, aside from some interesting pantheistic sounding slogans (like "Every Thing is to All, as All is to Every Thing"), and despite promising "A short Dissertation upon a Two-fold philosophy of the Pantheists" Toland's work has little to do with pantheism.
Pantheism
First published Tue Jun 4, 1996; substantive revision Thu May 17, 2007
Pantheism is a metaphysical and religious position. Broadly defined it is the view that (1) "God is everything and everything is God … the world is either identical with God or in some way a self-expression of his nature" (Owen 1971: 74). Similarly, it is the view that (2) everything that exists constitutes a "unity" and this all-inclusive unity is in some sense divine (MacIntyre 1967: 34). A slightly more specific definition is given by Owen (1971: 65) who says (3) "‘Pantheism’ … signifies the belief that every existing entity is, only one Being; and that all other forms of reality are either modes (or appearances) of it or identical with it." Even with these definitions there is dispute as to just how pantheism is to be understood and who is and is not a pantheist. Aside from Spinoza, other possible pantheists include some of the Presocratics; Plato; Lao Tzu; Plotinus; Schelling; Hegel; Bruno, Eriugena and Tillich. Possible pantheists among literary figures include Emerson, Walt Whitman, D.H. Lawrence, and Robinson Jeffers. Beethoven (Crabbe 1982) and Martha Graham (Kisselgoff 1987) have also been thought to be pantheistic in some of their work — if not pantheists.
The book recognized as containing the most complete attempt at explaining and defending pantheism from a philosophical perspective is Spinoza's Ethics, finished in 1675 two years before his death. In 1720 John Toland wrote the Pantheisticon: or The Form of Celebrating the Socratic-Society in Latin. He (possibly) coined the term "pantheist" and used it as a synonym for "Spinozist." However, aside from some interesting pantheistic sounding slogans (like "Every Thing is to All, as All is to Every Thing"), and despite promising "A short Dissertation upon a Two-fold philosophy of the Pantheists" Toland's work has little to do with pantheism.
So here is something on that subject.
