No, the pronoun I is always capitalized; the first word of a sentence is always capitalized. If you must use the incomplete word goin, it must be followed by an apostrophe to indicate the missing letter, goin'.The correct sentence is:I am going to pass the first grade.
The word imaginable is an adjective.
we'z goin chicken huntin.
Goin' to Memphis was created in 1968.
I Got It Goin' On was created in 1988.
Peter Goin was born in 1951.
Goin' On was created on 1980-03-11.
Goin' West was created in 1969.
Goin' Blind was created in 1974.
Where You Goin' Now was created in 1992.
Saint-Goin's population is 197.
Out Goin' Cattin' was created in 1986.