This article investigates how lexical and syntactic differences in L1 and L2 grammatical gender affect L2 predictive gender processing. In a visual-world eye-tracking experiment, 24 L1 Russian adult learners and 15 native speakers of German were tested. Both Russian and German have three gender classes. Yet, they differ in lexical congruency, that is, whether a noun ("house") is assigned to the same or a different gender class. Further, gender is syntactically realized on postnominal suffixes in Russian but on prenominal articles in German. For adjectives, both Russian and German mark gender on suffixes. In predictive gender processing, we find interactions of proficiency and congruency for gender-marked articles. Advanced L2 learners show nativelike gender prediction throughout. High-intermediate learners display asymmetries according to syntactic and lexical congruency. Predictive gender processing obtains for all nouns in the (syntactically congruent) adjective condition, yet only for lexically congruent nouns in the (syntactically incongruent) article condition.