none that i'm aware of, but it should be about the same as C

struct Triangle
{
    int id;
    vec3 v1;
    vec3 v2;
    vec3 v3;
    vec3 nor;
};

struct RayHit
{
    int triangleID;
    float distanceHitAt;
    vec3 inRayPos, inRayDir;
    vec3 outRayPos, outRayDir;
    vec3 surfacePos, surfaceNormal;
};

layout(std430, binding = 0) buffer SSBO {
    RayHit HitData1[RAY_BOUNCE_MAX];
    Triangle modelTriangles[];
}RTSceneData;

struct Triangle
{
    int id;
    vec3 v1;
    vec3 v2;
    vec3 v3;
    vec3 nor;
};

struct RayHit
{
    int triangleID;
    float distanceHitAt;
    vec3 inRayPos, inRayDir;
    vec3 outRayPos, outRayDir;
    vec3 surfacePos, surfaceNormal;
};

layout(std430, binding = 0) buffer SSBO {
    RayHit HitData1[RAY_BOUNCE_MAX];
    Triangle modelTriangles[];
}RTSceneData;

C#
struct SSBO {
    RayHit HitData1[RAY_BOUNCE_MAX];
    Triangle modelTriangles[];
}
.
.
SSBO[] sceneData;
.
.
.
Gl.BufferData<SSBO>(BufferTargetARB.ShaderStorageBuffer, sceneData, BufferUsageARB.DynamicDraw);

C#
struct SSBO {
    RayHit HitData1[RAY_BOUNCE_MAX];
    Triangle modelTriangles[];
}
.
.
SSBO[] sceneData;
.
.
.
Gl.BufferData<SSBO>(BufferTargetARB.ShaderStorageBuffer, sceneData, BufferUsageARB.DynamicDraw);