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.