Parmaatam*** (supreme soul, God, as oppose to individuals soul - atam{u}) has countless qualities. Some major ones are mentioned at the beginning** of Jap{u} ji Sahib.
** Some refer to this section of the gurbani as the Mool Mantar. 'Mool' infact refer's to the primodial origins as in "ਮਨ ਤੂੰ ਜੋਤਿ ਸਰੂਪੁ ਹੈ ਆਪਣਾ ਮੂਲੁ ਪਛਾਣੁ ॥ ਮਨ ਹਰਿ ਜੀ ਤੇਰੈ ਨਾਲਿ ਹੈ ਗੁਰਮਤੀ ਰੰਗੁ ਮਾਣੁ ॥ ਮੂਲੁ ਪਛਾਣਹਿ ਤਾਂ ਸਹੁ ਜਾਣਹਿ ਮਰਣ ਜੀਵਣ ਕੀ ਸੋਝੀ ਹੋਈ ॥ ਗੁਰ ਪਰਸਾਦੀ ਏਕੋ ਜਾਣਹਿ ਤਾਂ ਦੂਜਾ ਭਾਉ ਨ ਹੋਈ ॥ ਮਨਿ ਸਾਂਤਿ ਆਈ ਵਜੀ ਵਧਾਈ ਤਾ ਹੋਆ ਪਰਵਾਣੁ ॥ ਇਉ ਕਹੈ ਨਾਨਕੁ ਮਨ ਤੂੰ ਜੋਤਿ ਸਰੂਪੁ ਹੈ ਅਪਣਾ ਮੂਲੁ ਪਛਾਣੁ ॥੫॥: Mann toon joti saroop hai aapanaa mool pashaan. Mann har jee terai naal hai gurumutee rang maan. Mool pashaanahi taan sahu jaanahi maran jeevan kee sojhee hoee. Gur parasaadee eko jaanahi taan doojaa bhaaou na hoee. Mann saant aaee vajee vadhaaee taa hoaa paravaan. Iou kahai Nanak mann toon joti saroop hai apanaa mool pashaan ||5||: O my mind, you are the embodiment or the True Image of the Divine Light (i.e., God) - recognize your Origin (Roots, Reality, etc.). O my mind, the Divine is with you; through the Divine Teachings, enjoy His Love. Acknowledge your Source, and then you will know your Divine Beloved, and understand death and birth. By the Divine Grace, know the One; then, you will not love any other. Peace comes to the mind, and gladness resounds; then, you will be acclaimed. Thus says Nanak: O my mind, you are the embodiment or the True Image of the Divine Light (i.e., God) - recognize your Origin ||5|| (sggs 441)."

*** parmatam(u) - ਜਿਨੀ ਆਤਮੁ ਚੀਨਿਆ ਪਰਮਾਤਮੁ ਸੋਈ ॥: Jinee aatam cheeniaa parmaatam soee: Those who understand their own Soul, are themselves Parmaatam (sgg 421).

(a) The one (Ek) God (Oan(g)). Kaar means All Powerful, Everywhere, in Everything, and the Doer.	Ek Oan{g}kaar
(b) The power, the essence, everlasting reality of Gods presence (naam) is the Truth (Sat).	Satnaam
(c) The creator (Karta) supreme being God (Purkh).	Karta Purkh
(d) Devoid of fear. (Ner means without or devoid).	Nerbhau
(e) Devoid of enmity.	Nervair
(f) Deathless. Not subject to time.	Akaal Moorat
(g) Without birth.	Ajooni
(h) Self-manifested.	Saibhan{g}
(i) We can attain God realisation (whilst alive) only with the grace of the Guru, by following the Guru’s teachings (expression in words of the One Truth).	Gur Parsaad