This forum is the best place to make suggestions 🙂
However, I recommend that if you have a product that you should become a Corporate member so that you work with other companies on your proposal.

I am working on an application that I have called Synth Tracker, It's a music tracker heavily based off of Impulse Tracker, but add in more features and simple yet powerful additive, subtractive chip based and organ samples that will play back a sample at different harmoncs. At the moment it only exists as a synthesiser in Java that plays back MIDI files.

I have been developing a midi bank schematic for the program that adds on a bunch of new program sounds that I feel like are lacking from the already existing Genral MIDI 2 spec and would love to have it be refined and useable to all. I have a draft of it on a document, but don't know where to share it for feedback.

Some notable additional program sounds it contains are, Toy piano (Program 8/9, bank 1), Melodica and Taxi horns (Program 22/23, banks 1 and 2), String bass (program 35/36, bank 1), 4 Acid rain bass sounds (Program 39/40, banks 4-7) Variation of pizzicato, tremolo, strings and slow strings for: violins, violas, celli, and double basses; more sine, square and pulse wave banks under program 80 and a melodic TR808 cowbell (program 113/114, bank 1) (the program section with 2 numbers are written as (zero based numbering/one based numbering) All banks are using 0 based numbering.

What should I do?

You can submit a proposal here and we can share with The MIDI Association Technical Standards Board.

I would submit it here, but I can't see a way to upload the PDF file.

When you are posting,  there is a place to attach a file.

Thanks, I don't know how I missed that. I was looking in the top area.

I fixed a few mistakes and altered my drum note map to include a finger snap.