GPA questions

Hey everyone, I have a WAM from USYD of 65.2 and I have just used the Gemsas and have a GPA of 5.3. I have two questions!

1. If someone else has transferred from one undergrad to another degree and therefore majority of their transcript is credit units, did this affect your GPA? And my fail mark from my original academic transcript isn’t included in my final transcript, is this too good to be true? 😂
2. Can someone please let me know what they did to boost their GPA, I haven’t done an honours year and can if I want. I am tossing up between this and a masters in public health. All help is appreciated! Thank you!