I am enlisting below some of the 'tuks' about gurmukhs for ready reference as well.

Since you are here only I am posting the followings from the 'Sukhmani sahib ji'.It describes at one place the Gurmukh and some attributes and qualities .



gauVI mhlw 1 ] (227-12)
Gauree, First Mehl: Gurmukhs
bolih swcu imiQAw nhI rweI ] (227-12, gauVI, mÚ 1)
They speak the Truth - not an iota of falsehood.
cwlih gurmuiK hukim rjweI ] (227-12, gauVI, mÚ 1)
The Gurmukhs walk in the Way of the Lord's Command.
rhih AqIq scy srxweI ]1] (227-12, gauVI, mÚ 1)
They remain unattached, in the Sanctuary of the True Lord. ||1||
sc Gir bYsY kwlu n johY ] (227-13, gauVI, mÚ 1)
They dwell in their true home, and Death does not touch them.

gurmuiK syvw pRwn ADwrw ] (229-18, gauVI, mÚ 3)
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/gurmat-vichaar/18405-goal-of-human-life.html
Selfless service is the support of the breath of life of the Gurmukh.
gurmuiK ivchu haumY jwie ] (230-1, gauVI, mÚ 3)
The Gurmukh eradicates egotism from within.
gurmuiK mYlu n lwgY Awie ] (230-1, gauVI, mÚ 3)
No filth sticks to the Gurmukh.

gurmuiK krm Drm sic hoeI ] (230-2, gauVI, mÚ 3)
Through karma and Dharma, good actions and righteous faith, the Gurmukh becomes true.

gurmuiK Ailpq rhy ilv lweI ]5] (230-13, gauVI, mÚ 3)
The Gurmukhs remain detached, and lovingly attune themselves to the Lord. ||5||

gurmuiK myly Awpu gvwey ] (232-18, gauVI, mÚ 3)
The Gurmukhs shed their ego, and merge with the Lord.

gurmuiK Bgiq Bwau Duin hoeI ] (415-17, Awsw, mÚ 1)
The Gurmukh shows his love through loving devotional worship.
squ sMqoKu sBu scu hY gurmuiK pivqw ] (512-2, gUjrI kI vwr, mÚ 3)
The Gurmukh is totally truthful, content and pure.
AMdrhu kptu ivkwru gieAw mnu shjy ijqw ] (512-2, gUjrI kI vwr, mÚ 3)
Deception and wickedness have departed from within him, and he easily conquers his mind.
gurmuiK ijs no Awip kry so hoie ] (560-2, vfhMsu, mÚ 3)
He alone becomes Gurmukh, whom the Lord so blesses.
gurmuiK sbdu scu krxI swru ] (560-3, vfhMsu, mÚ 3)
The Gurmukh lives the True Word of the Shabad, and practices good deeds.


BUT
jn nwnk kotn mY iknhU gurmuiK hoie pCwnw ]2]2] (685-2, DnwsrI, mÚ 9)
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=18405
O servant Nanak, among millions, only a rare few, as Gurmukh, realize God.





There should be some others that I have not included.