Official GGEMS news, releases, project milestones, publications, events, and important community announcements.

Installation, building GGEMS, dependencies, first simulations, Python usage, documentation, examples, and general user questions.

World and volume geometry, coordinate systems, transformations, materials, navigation, intersections, boundaries, and related simulation geometry topics.

Particle sources, emission geometries, angular and energy distributions, activity-driven sources, radionuclides, radioactive decay, and particle definitions.

Physical processes, particle transport, secondary generation, interaction sampling, energy cuts, range cuts, and transport algorithms.

Observers, scoring, detector outputs, projections, counters, simulation results, data formats, and post-processing.

GGEMS GuiMode, Vulkan, Dear ImGui, cameras, particle traces, visualization tools, rendering, and graphical-interface discussions.

OpenCL, CPUs, GPUs, multi-device execution, kernels, memory, SVM, device selection, profiling, optimization, and performance discussions.

Scientific validation, reproducibility, RNG validation, source and physics validation, benchmarks, and comparisons with Geant4, OpenGATE, or other reference software.

GGEMS internals, C++ architecture, Python bindings, public API, testing, build system, contributions, design proposals, and future development.

Questions and suggestions concerning the GGEMS Community forum, documentation ecosystem, and other community services.