Dear students interested in this project. I just opened an issue on github (https://github.com/brian-team/brian2/issues/1162) that I invite all students to work on. The issue does not necessarily require advanced programming skills, what we are more interested in is that you show that: 1) you are able to navigate and (at least partially) understand the Brian2 code base so that you can implement and test a small feature for it, and 2) that you are at ease working with github and contributing via its pull request feature.
Note that this is of course a bit of an artificial situation, usually we wouldn’t have multiple developers working on the same feature in parallel (I wish having too many developers were a common problem 
). This is not a race, do not worry about being the first to open a pull request, but maybe do not wait until the last day of the application period either. Since everything is done in the open you are of course free to look at the work the other students are doing, but please do things the way you think they should be done, regardless of whether others are taking a different approach. Also of course feel free to ask questions in the pull request and/or in the issue if you are unsure about something.
Please refer to the pull request you open as part of your GSoC application (I will give some more information about what we expect to see in that application later), we will not merge any of them before the end of the application period.