There are two stanzas in the poem "God's Grandeur" by Gerard Manley Hopkins. The poem is a Petrarchan sonnet which consist of fourteen lines.
The first stanza of this poem consists of eight lines. In this stanza's first four lines, lines one and four rhyme and lines two and three rhyme. Therefore, the rhyme scheme of the first four lines is "abba". In fact, this is the same rhyme scheme for the next four lines of this eight line first stanza.
The second stanza of the poem is six lines.
The rhyme scheme of this second stanza is "ababab".