G-Tar - A way to type 'guitar' because typing the whole word is too

A way to type 'guitar' because typing the whole word is too much work. Like a toddler trying to write.

I use G-Tar instead of guitar because my fingers are too lazy.

She texts 'I’m playing G-Tar' instead of 'I’m playing guitar.'

He said he was going to practice, but he just typed G-Tar and left.