This Open Access book constitutes the proceedings from the First Global Internet of Things and Edge Computing Summit, GIECS 2024, held in September 24–25, 2024, in Brussels, Belgium. The 12 full papers presented here were carefully reviewed and selected from 21 submissions. These papers have been organized under the following topical sections: Industrial Internet of Things (IIoT) and Digital Twins; Data Management, Privacy, and Trust in Distributed Systems; Edge Computing and Cross-Domain Systems.