The GNU project will apply for GSoC again. I have started a page for project ideas here:
https://libreplanet.org/wiki/Group:Guix/GSoC-2021 If you think a student can help your project, do add your idea. Every project should have 2 or 3 mentors. Note that the work should be doable in ~180 hours over the summer and the student my or may not have prior skills. It is meant for learning, but in the end it may help your project too! Over the years I have mentored quite a few GSoC students and it is useful fun. Pj.