dinidiscuss nila sa GCP yung rights mo as spouses and provide you info on where you can seek help. Also, they will issue a certificate na parang nag-aapprove sayo and sa spouse mo na legit kayo, preventing any chances of human trafficking or mail order brides. The same cert you can use if you need to update your passport to your married name.
Yung PDOS po purely about what you need to knwo before you depart...like what to bring, what not to bring, etc. These things will also be discussed sa GCP.
GCP can be done anytime, but appointment is needed. PDOS can only be done once may visa na. Kung tapos na GCP at ginawa prior to receipt of visa, balik na lang po kayo sa CFO pag visa on hand na for the sticker.