The Christian concept of God is that he is the single and solitary Supreme Being who exists independent of the universe, who does not change, is absolute, transcends space and time, who is self-aware, who is all-knowing, ever-present, and can accomplish whatever he desires to accomplish. Furthermore, God is a trinity of persons: Father, Son, and Holy Spirit.
The CARM Statement of Faith says, “God is the only Supreme Being with no gods created before or after Him in all of existence, in all places, in all time (Isaiah 43:10; 44:6; 44:8; 1 Tim. 1:17). He has always been God and was never anything else (Psalm 90:2). He is Holy (Rev. 4:8), Eternal (Isaiah 57:15), Omnipotent (Jer. 32:17,27), Omnipresent (Psalm 139:7-12), Omniscient (1 John 3:20), etc. He is Love (1 John 4:8, 16), Light (1 John 1:5), Spirit (John 4:24), Truth (Psalm 117:2), Creator (Isaiah 40:12,22,26), etc. He is to be worshiped (Gen. 24:26; Ex. 4:31; 2 Chron. 29:28; 1 Cor. 14:25; Rev. 7:11). He is to be served (Matt. 4:10;1 Cor. 6:19; Phil. 3:7; 1 Thess. 1:9; Heb. 9:14). He is to be proclaimed (Matt. 28:19f.; John 14:15f.; Acts 1:8).”