I did some experimentation back in March, but it wasn't my work, I've found that Dwayne Slater (ds84182 on github) has made some modifications (with SDL) to get it through https://github.com/ds84182?utf8=&tab=repositories&q=flutter

I was able to get the gallery on, had to do some tweaks (like enforce binary mode when reading files, and certain other things, but haven't looked since then).