The Institute of Electrical and Electronic Engineers (IEEE) recently announced a new "IEEE Transaction on Artificial Intelligence". Although the topics listed do not specifically mention AGI they do not limit it. I think this will be an interesting journal to keep an eye on as there could be some interesting AGI papers. Below is from their web page:
Welcome to the page for the IEEE Transactions on Artificial Intelligence (IEEE TAI). IEEE has established the new journal our community has been waiting for to publish our work on Artificial Intelligence! The submission site for manuscripts opens on April 1, 2020, and the inaugural issue is set to publish August 2020. Don’t miss out on this opportunity and join the community of authors who started already preparing their papers for the IEEE TAI! In one month, you will be able to submit your paper. It is time to prepare your best piece of work for IEEE TAI to increase your visibility in the international AI community and to be among the first authors to publish in IEEE TAI.
There is also the IEEE Transactions on Cognitive and Developmental Systems (TCDS) which is not strictly AGI but publishes topics that pertain to AGI.
The IEEE TRANSACTIONS ON COGNITIVE AND DEVELOPMENTAL SYSTEMS (TCDS) focuses on advances in the study of development and cognition in natural (humans, animals) and artificial (robots, agents) systems. It welcomes contributions from multiple related disciplines including cognitive systems, cognitive robotics, developmental and epigenetic robotics, autonomous and evolutionary robotics, social structures, multi-agent and artificial life systems, computational neuroscience, and developmental psychology. Articles on theoretical, computational, application-oriented, and experimental studies as well as reviews in these areas are considered.
TCDS is co-sponsored by the Computational Intelligence Society, the Robotics and Automation Society, and the Consumer Electronics Society. TCDS is technically co-sponsored by the Computer Society.