举栗如图，将数组以二维矩阵的方式显示到Inspector面板

using UnityEngine;
using UnityEditor;

[System.Serializable]
public class InspectorGrid
{
    public int rows;
    public int columns;

    [SerializeField]
    bool[] enabledBools;
}

// ------

//用PropertyDrawer自定义Inspector面板显示外观
[CustomPropertyDrawer(typeof(InspectorGrid))]
public class InspectorGridDrawer : PropertyDrawer
{
    float gridWidth = 15f;
    float gridHeight = 15f;
    float gridSpace = 1f;

    int rows;
    int columns;

    //自定义面板显示
    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
    {
        //position: 在Inspector面板的位置、大小
        //property: 待绘制的属性
        //label: 值的字段名

        //绘制一个SerializedProperty的属性字段
        EditorGUI.PropertyField(position, property, label, true);

        //获取属性信息
        SerializedProperty data = property.FindPropertyRelative("enabledBools");
        rows = property.FindPropertyRelative("rows").intValue;
        columns = property.FindPropertyRelative("columns").intValue;

        if (rows < 0)
            rows = 0;

        if (columns < 0)
            columns = 0;

        //指定数组大小
        data.arraySize = rows * columns;

        //自定义显示区域
        if (property.isExpanded)
        {
            int count = 0;
            float targetX;
            float targetY;

            //遍历
            for (int r = 0; r < rows; r++)
            {
                for (int c = 0; c < columns; c++)
                {
                    //计算位置
                    targetX = position.xMin + ((gridWidth + gridSpace) * (c + 1));
                    targetY = 60 + position.yMin + (gridHeight + gridSpace) * (r + 1);
                    //位置、大小
                    Rect rect = new Rect(targetX, targetY, 15f * (EditorGUI.indentLevel + 1), gridHeight);
                    //绘制属性值
                    EditorGUI.PropertyField(rect, data.GetArrayElementAtIndex(count), GUIContent.none);

                    count++;
                }
            }
        }
    }

    //自定义高度
    public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
    {
        //按照行数增加高度
        if (property.isExpanded)
            return EditorGUI.GetPropertyHeight(property) + 20 + (15 * (rows + 1));

        return EditorGUI.GetPropertyHeight(property);
    }

}

// 测试，Inspector面板显示如上图

using UnityEngine;

public class Test : MonoBehaviour
{
    [SerializeField] InspectorGrid grid;

}