We have a product called GMAT Navigator that provides our own answers to the Official Guide solutions—and that product does come with All the GMAT. So if you have registered your book set, you have access to Navigator in your syllabus.
Our GMAT Navigator product cannot be directly connected to the Official Guide—they are two different products. But you can look up any Official Guide problems by problem number and edition number (eg, OG2020) in our Navigator product.
Note: We have not yet posted solutions for the Official Guide 2021 edition (the edition that was published bout 6 weeks ago). We're working on adding the solutions now—they'll be up in about a month. If you have OG2021, you can email our Student Services team (gmat@manhattanprep.com) to get a conversion list of problem numbers from OG2020 to OG2021. Most of the problems appear in both editions; only about 90 problems in OG2021 do not also appear in OG2020.