This can be stated using an active form. Alternate translation: "God has given grace to each one of us" or "God gave a spiritual gift to each believer" (See: [[rc://en/ta/man/jit/figs-activepassive]])
Here "the gift of Christ" refers to a gift that Christ has given. Alternate translation: "according to the amount that Christ has given us" (See: [[rc://en/ta/man/jit/figs-abstractnouns]])