The rules will be similar to the usual rules of the IPT (see IPT website: https://iptnet.info/official-rules/) that in short are also presented here on the website of the GPT (https://germany.iptnet.info/rules/).
For example, there is a simplification on what problems can be challenged: Each team has to announce which problems it has worked on (probably at least one problem per participant). Only these problems can be challenged by other teams and the team can only report on the problems that it has announced. Therefore, to participate, it is sufficient if every participant works on one problem.
Furthermore, participants of the Online-GPT are allowed to present their problem again in the physics fights of a qualifying GPT (with a maximum of two Online-GPT-problems per team).
The rules can be downloaded here or below.ruleset