I applied on GM workday website. Got HR screening call after 3 weeks since I submitted my application, and then he verbally confirmed that there will be a first round interview in the following week. Then I received the first interview invitation shortly after. The first round is technical and it is fairly easy consider I only have ~1 day to prepare. Basically a brief resume walk through, mainly focusing on Android projects I did in the past. Then some back to back Java and Android related questions. All questions are knowledge based (i.e. do you know what is XXX in Java/Android), no tricks. no algorithm challenges. Next, the same HR contact me ~3 days after the first round and told me there will be a final round. And I immediately got the interview invitation. The second round is pure behavioral. There are two interviewers and they first did a short resume walk through, and switched to behavior questions. They asked me specifically to follow the STAR format, and provide detailed examples for my answers. I immediately got the verbal offer the day after the second round, and got my official offer 1 week later. Then a criminal background check and that's it. Overall great and fast experience. All interviwers are friendly and the whole process is pleasant.

Made it to the 45 minute technical interview stage of the hiring process after screening. Very unlike interview reviews left by others on Glassdoor I had read prior to my experience. No STAR questions were asked; it was strictly technical questions regarding your resume and skills related to the job posting, so be well prepared.