Depends if u stay in public sector polyclinics or come out into private to be GP. Private if u set up yr own clinic or do fulltime locum or be an anchor Dr in a private clinic.

I am an adhoc locum and been a locum fulltime for 10 years. Really depends for me what r the jobs available and how hard I want to work. Jobs r there esp if u don't mind working nights and weekends. Rates r variable, generally about S$80-$100 per hr. Sometimes lower if slack or new clinic and higher if very busy clinic snd u r able to see many patients. As some clinics give tiered rates, u can also try to negotiate higher rates if last minute slots or if u r good at bringing in sales like for health screening and vaccinations and u r a regular locum.

Not sure about private clinics basic pay range now. But as a locum, if u work hard, u can bring in more than S$10k a month. My best was S$15k one month but that was several years ago. I cannot work too many hrs and don't like odd hrs so I am sure many other male locums do better than me a female with family ie kids' commitments.

I like the freedom being a locum brings with the ability to plan yr own timings of work. But no cpf nor paid leave like mc and annual and hospitalisation leave nor bonus.
I experienced how difficult it is to get mc as an employee even when pregnant. Much easier as locum when leave is unpaid. Can take long breaks if I feel like it too.